when using shortcut shift-cmd-= to perform a zoom to selection, the object is being centred, which is good, but the zoom view is too small given that there're just too many spaces being left around the object.

Ideally, when zoom to selection this will snugly fit the object just into the window, which I found an interesting coincidence. Say for example, theres an object thats being set to zoom to selection, and the zoom level of it is 30.7% (and just feel how small the object would look on screen at this level), then you multiply this number by 2, and change the zoom level to 61.4%, and boom, the object can PERFECTLY fit into the window.

I assume this is what this shortcut mean to perform in old days when there's no retina display (which is why you multiply 2 and it fits perfectly)

but instead of fit it perfectly into the window (which by even fixing this is already a huge appreciation), I prefer to leave a tiny small gap around the mostly closed edge (eg the top & bottom gap for a portrait object, or the left and right gap for lanscape), quite often what i want to do next is to resize, and if they fit perfectly next to the edge, its hard to select the corner or so to drag. By leaving a small gap this will be the ultimate solution for this shortcut